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QuantiFERON-TB Gold

eD-H Order Code

LAB3382

Specimen Collection Information

Specimen Minimum Test Volume Container Special Handling
Blood 1.0 ML Call Lab Incubate 37C

Specimen Transport Temperature

Ambient

Specimen Stability

Samples must arrive within 16 hours of collection.


Chemistry Blood and Urine Analyte Stability Chart

Additional Specimen Instructions

Four QuantiFERON-TB Gold Plus collection tubes (1 gray, 1 green, 1 yellow and 1 purple) supplied by Cellestis, Inc. must be used. Standard phlebotomy tubes are not acceptable. The QuantiFERON-specific tubes are stored at DHMC Level 3 Blood Draw area, Southern NH labs and draw stations. Instructions for blood collection, labeling and handling are provided with the tubes.
This test requires that the collection tubes be incubated at 37° C as soon as they reach the DHMC Pathology lab and within 16 hours of being drawn.
Before incubation, the tubes must be maintained at Ambient. Samples must be incubated at 37° C for 16-24 hours before submission to Special Chemistry. Only specimens incubated 16-24 hours are acceptable. Once incubated, the samples can be stored refrigerated for 72 hours prior to being spun.

Reference Ranges / Critical Values

Assay Gender Age Range Normal Range Critical Values Units
Quantiferon TB All 0 Minutes – 150 Years Negative

Interpretive Data

Assay Display Interpretive Data
Quantiferon TB Reference range: Negative The performance of the Quantiferon-TB Gold IT test has not been extensively evaluated in children younger than 17 years of age. Therefore there is no published data to document the performance of QFT-G in this age group.
Quantiferon TB Interp The performance of the QFT-Plus assay has not been extensively evaluated with specimens from the following individuals: Individuals who have impaired or altered immune functions such as those who have HIV infection or AIDS those who have transplantation managed with immunosuppressive treatment or others who receive immunosuppressive drugs (e.g. corticosteroids methotrexate azathioprine cancer chemotherapy) those who have other clinical conditions such as diabetes silicosis chronic renal failure and hematological disorders (e.g. leukemia and lymphomas) or those with other specific malignancies (e.g. carcinoma of the head or neck and lung). Individuals younger than age 17 years Pregnant women. Diagnosis of or the exclusion of tuberculosis disease and assessment of Latent Tuberculosis Infection (LTBI) requires a combination of epidemiological historical Medical and diagnostic findings that should be taken into account when interpreting QFT-Plus results.

Day(s) Performed

Monday, Wednesday, Friday; Time varies

Performing Lab Section

Chemistry

CPT(s)

86480